CN206060549U - A kind of power module - Google Patents
A kind of power module Download PDFInfo
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- CN206060549U CN206060549U CN201621124023.4U CN201621124023U CN206060549U CN 206060549 U CN206060549 U CN 206060549U CN 201621124023 U CN201621124023 U CN 201621124023U CN 206060549 U CN206060549 U CN 206060549U
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Abstract
This utility model is related to power supply test field, particularly a kind of power module.Including control circuit, power conversion module, sawtooth waveforms module；In the power module that this utility model is provided, two former limits that transformator includes and connects, two former limits are respectively adopted anti-phase control signal control on or off；Meanwhile, the outfan of transformator is provided with filter circuit before rectification circuit, effectively reduces the spike of output circuit, improves ripple characteristics.
Description
Technical field
This utility model is related to power supply test field, particularly a kind of power module.
Background technology
Generally, when the test related to DC source is carried out, engineer must collect and configure multiple stage instrument, could be complete
Into direct current supply and measuring task.When these complex tasks are performed, multiple stage test instrunment may be connected to simultaneously, so as to increase
The risk of error；For this purpose, engineer may select the automatic test complicated more than manual test, although automatic test task
Manual errors can be reduced, but the research and development engineer write with debugging routine to having worked overloadingly further increases work
Amount.And the appearance of DC source analyser avoids engineer using the debugging that complexity is carried out before multiple devices and test.Electricity
Electric current of the source analyser by the measurable inflow DUT of its built-in electric current kinetic measurement ability, without such as current probe
With this kind of sensor of diverter；, without the need for exploitation control and process of measurement, institute is functional and measures all integrated for DC source analyser
In same equipment, without PC, driver and software, more than 90% is reduced equivalent to the workload related to setting；
Direct current supply and measurement test assignment that user then can be just completed with 2 day time using independent test equipment, using unidirectional current
Source analyser just be able to can be completed in 5 minutes.And it is usual, circuit tester module, oscillograph mould are integrated with DC source analyser
There is module, data recordin module and multiple DC power suppliers in block, random waveform, wherein, it is multiple with different output works
The DC power supplier of rate is undoubtedly one of most crucial device of power analysis instrument, and power module carries defeated within the specified range
Go out each clock power waveform task of given voltage value or specified current flow value, the higher stability of its needs, while power module
Need other module compatible combinations with power analysis instrument.
Utility model content
Goal of the invention of the present utility model is the demand for each power module stability in DC source analyser,
There is provided a kind of working stability, it is adaptable to particular power module circuit in power analysis instrument.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of power module, including control circuit, power conversion module, sawtooth waveforms module；
The sawtooth waveforms module includes current sampling circuit, voltage sample circuit, feedback circuit and saw-tooth wave generating circuit；
The current sampling circuit, voltage sample circuit gather sampling electricity from the outfan and/or load end of the circuit for power conversion
Stream, sampled voltage, and the sample rate current, sampled voltage are respectively sent to into the feedback circuit；
The power conversion module includes PWM drive circuit, circuit for power conversion, current rectifying and wave filtering circuit and output filtered electrical
Road；
The control circuit sends sawtooth wave control signal to the saw-tooth wave generating circuit to produce benchmark sawtooth waveforms, should
Benchmark sawtooth waveforms combines sample rate current and/or sampled voltage is produced and specifies waveform sawtooth waveforms；The control circuit is also by the finger
Determine sawtooth waveforms to send to PWM drive circuit as pwm control signal, to drive the circuit for power conversion work.
Further, the circuit for power conversion includes transformator；
The PWM drive circuit includes first control circuit, second control circuit；
The current rectifying and wave filtering circuit includes the filter circuit being sequentially connected in series and rectification circuit；
The transformator includes first former limit and the second former limit of parallel connection；The first control circuit is defeated with the first former limit
Go out end connection；The second control circuit is connected with the outfan of the second former limit；The secondary of the transformator is by the filtering
Circuit is connected with the rectification circuit.
Circuit for power conversion in common power supply can't arrange the filter circuit before changing rectification circuit again, this practicality is new
In type, the effect of the filter circuit is the ripple for reducing transformator output, is carried out presetting before to transformer output signal rectification
Whole, the increase of the circuit sacrifices signal processing efficiency to a certain extent, but this utility model is arranged before rectification circuit
The circuit but effectively reduces the spike of output signal, allows the ripple of output signal to be much improved.
Further, the first control circuit includes the first shaping circuit, first switch and the first peak absorbing circuit；
The second control circuit includes the second shaping circuit, second switch and the second peak absorbing circuit；
The first switch is connected with the outfan of first former limit；The second switch is defeated with second former limit
Go out end connection；
The input of first shaping circuit receives the first control signal, and its outfan connects the control of the first switch
End processed；
The input of second shaping circuit receives the second control signal, and its outfan connects the control of the second switch
End processed；
First peak absorbing circuit is with the first switch and connects；Second peak absorbing circuit and described second
Switch and connect；
First control signal is anti-phase with second control signal；First control signal, the second control signal
For PWM anti-phase mutually；First shaping circuit and the second shaping circuit are respectively used to allow the first control signal, second to control
The rising edge of signal is more precipitous, so as to accelerate the response speed of first switch and second switch.
Further, first peak absorbing circuit and second peak absorbing circuit include and connect two are electric
Resistance and the electric capacity concatenated with this and two resistance connecing.
Further, the first switch, second switch are field effect transistor；The drain electrode of the first switch connects described first
The outfan of former limit, the source ground of the first switch；The drain electrode of the second switch connects the outfan of second former limit；
The source ground of the second switch.
Further, the current collection circuit is arranged on the input of the transformer primary side.
Further, the input of the input of the first former limit and second former limit access in parallel electric current is adopted
Collector.
Further, the current collection circuit is inductance.
Further, the filter circuit includes and connects first resistor, second resistance, 3rd resistor and the 4th resistance,
And the first electric capacity concatenated with the first resistor, second resistance, 3rd resistor and the 4th resistance；The filter circuit and institute
State the secondary of transformator and connect.
Further, the rectification circuit is bridge rectifier.
The sawtooth waveforms module includes current sampling circuit and/or voltage sample circuit, and, sample rate current process circuit
And/or voltage sample circuit, auxiliary sawtooth wave generating circuit, main sawtooth wave generating circuit and the second comparison circuit；
The sample rate current process circuit includes two inputs, and described two inputs are received from power conversion electricity respectively
The sample rate current of two, transformator former limit collection in parallel in road, and export after being processed into the first signal；
The auxiliary sawtooth-wave circuit receives the first control wave P_RAMP sent from controller, and is located
Manage to export after secondary signal；
The main sawtooth-wave circuit receives the second control wave AUX_RAMP sent from controller, and is located
Manage to export after the 3rd signal
First signal, secondary signal and the 3rd Signal averaging be the 4th signal, the 4th signal transmission to second
Comparison circuit positive terminal；The end of oppisite phase of second comparison circuit receives an error voltage signal, and exports sawtooth waveforms.
Further, sample rate current process circuit includes the full bridge rectifier being sequentially connected, resistance sampling circuit, samples
Filter circuit and the first build-out resistor；The two ends of the resistance sampling circuit connect the full bridge rectifier respectively two are defeated
Go out end.
Further, the filter circuit is LC filter circuits
Further, the auxiliary sawtooth wave generating circuit includes the first negative circuit, the first discharge and recharge being sequentially connected
Circuit and the second build-out resistor.
Further, the first charge-discharge circuit includes first resistor, second resistance and the first electric capacity；The second resistance
One end is connected with the outfan of first negative circuit, the other end of the second resistance and the first resistor, first electric
One end connection of appearance；The other end of the first resistor is connected with power supply；The other end ground connection of first electric capacity.
Further, the main sawtooth wave generating circuit includes the second negative circuit, the second discharge and recharge electricity being sequentially connected
Road, sawtooth comparison circuit and the 3rd build-out resistor.
Further, the second charge-discharge circuit includes 3rd resistor, the 4th resistance and the second electric capacity；The 3rd resistor
One end is connected with the outfan of second negative circuit, the other end of the 3rd resistor and the 4th resistance, second electric
One end connection of appearance；The other end of the 4th resistance is connected with power supply；The other end ground connection of second electric capacity.
Further, the sawtooth comparison circuit includes the 5th resistance, the 6th resistance, the 7th resistance and comparator；It is described
One end of 5th resistance is connected with the normal phase input end of comparator, and the other end is connected with the outfan of the comparator；The ratio
It is connected with described second capacity earth one end by the 6th resistance compared with the inverting input of device；The inverting input of the comparator
Also it is connected with the outfan of comparator by the 7th resistance；The normal phase input end of the comparator also with the 3rd resistor,
One end connection of four resistance connection.
In sum, as a result of above-mentioned technical proposal, the beneficial effects of the utility model are：
In the power module that this utility model is provided, two former limits that transformator includes and connects, two former limits are respectively adopted
Anti-phase control signal control on or off；Meanwhile, the outfan of transformator is provided with filter circuit before rectification circuit, effectively
The spike of output circuit is reduced, ripple characteristics are improved.
In certain embodiments, rectification circuit is provided with control circuit, make the rising edge of control signal more precipitous, from
And accelerate the response speed of switch；Sharp wave absorbing circuit is additionally provided with control circuit, circuit characteristic is effectively improved, point is prevented
Ripple occurs.
In this utility model using by collection from power module transformator and two former limits connecing sample rate current, head saw tooth
Wave generation circuit produce sawtooth waveforms, auxiliary sawtooth-wave circuit produce auxiliary sawtooth waveforms superposition after, by a comparator with it is anti-
The error voltage of feedback produces the sawtooth waveforms of the random waveform specified after being compared；Adopt
Within the whole PWM duty cycle cycle, the waveform of sawtooth waveforms is in ascendant trend and unsaturated.
Description of the drawings
Fig. 1 is this utility model structured flowchart.
Fig. 2 is this utility model power conversion module structural representation.
Fig. 3 a are first control circuit structured flowcharts in this utility model.
Fig. 3 b are second control circuit structured flowcharts in this utility model.
Fig. 4 is this utility model power conversion module circuit diagram.
Fig. 5 a are first control circuit circuit diagram specific embodiments in this utility model.
Fig. 5 b are second control circuit circuit diagram specific embodiments in this utility model.
Fig. 6 is sawtooth waveforms modular structure schematic diagram in this utility model.
Fig. 7 is sample rate current process circuit circuit diagram in this utility model.
Fig. 8 is auxiliary sawtooth wave generating circuit and main sawtooth wave generating circuit circuit diagram in this utility model.
Fig. 9 is the second comparison circuit circuit diagram in this utility model.
Specific embodiment
Below in conjunction with the accompanying drawings, this utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit this utility model.
Embodiment 1：As shown in figure 1, a kind of power module, including control circuit, power conversion module, sawtooth waveforms module；
The sawtooth waveforms module includes current sampling circuit, voltage sample circuit, feedback circuit and saw-tooth wave generating circuit；
The current sampling circuit, voltage sample circuit gather sampling electricity from the outfan and/or load end of the circuit for power conversion
Stream, sampled voltage, and the sample rate current, sampled voltage are respectively sent to into the feedback circuit；
The power conversion module includes PWM drive circuit, circuit for power conversion, current rectifying and wave filtering circuit and output filtered electrical
Road；
The control circuit sends sawtooth wave control signal to the saw-tooth wave generating circuit to produce benchmark sawtooth waveforms, should
Benchmark sawtooth waveforms combines sample rate current and/or sampled voltage is produced and specifies waveform sawtooth waveforms；The control circuit is also by the finger
Determine sawtooth waveforms to send to PWM drive circuit as pwm control signal, to drive the circuit for power conversion work.
Further, as shown in Figure 2, Figure 4 shows, the circuit for power conversion includes transformator T3；
The PWM drive circuit includes first control circuit 200, second control circuit 300；
The current rectifying and wave filtering circuit includes the filter circuit 400 being sequentially connected in series and rectification circuit 500；
The transformator T3 includes first former limit and the second former limit of parallel connection；The first control circuit 200 is former with first
The outfan connection on side；The second control circuit 300 is connected with the outfan of the second former limit；The secondary of the transformator T3 leads to
Cross the filter circuit 400 to be connected with the rectification circuit 500.
Circuit for power conversion in common power supply can't arrange the filter circuit 400 before changing rectification circuit 500 again, this
In utility model, the effect of the filter circuit 400 is the ripple for reducing transformator T3 outputs, whole to transformator T3 output signals
Pre-adjustment is carried out before stream, the increase of the circuit sacrifices signal processing efficiency, but this utility model to a certain extent whole
The spike that the circuit but effectively reduces output signal is set before current circuit 500, allows the ripple of output signal greatly to be changed
It is kind.
As shown in Fig. 3 a, Fig. 3 b, Fig. 5 a, Fig. 5 b, the first control circuit 200 includes the first shaping circuit 202, first
Switch Q1 and the first peak absorbing circuit 203；
The second control circuit 300 includes the second shaping circuit 302, second switch Q2 and the second peak absorbing circuit
303；
First switch Q1 is connected with the outfan 11 of first former limit；The second switch Q2 is former with described second
The outfan 1 on side connects；
The input of first shaping circuit 202 receives the first control signal PWM1, its outfan connection described first
The control end of switch Q1；The input of second shaping circuit 302 receives the second control signal PWM2, and its outfan connects institute
State the control end of second switch Q2；First peak absorbing circuit 203 is with first switch Q1 and connects；Second spike
Absorbing circuit 303 is with the second switch Q2 and connects；First shaping circuit 202 includes the 5th diode that is anti-and connecing and the
Six diodes（The 5th diode and the 6th diode that D4 in Fig. 5 a represents that this is anti-and connects）, wherein, the 5th diode
Negative pole and positive pole short circuit, the input of the negative pole of the 6th diode for control signal PWM1, the positive pole of the 6th diode and the
With the 5th resistance R5 and connect after six resistance R6 concatenations；Likewise, second shaping circuit 302 includes the seven or two pole that is anti-and connecing
Pipe and the 8th diode（The 7th diode and the 8th diode that D5 in Fig. 5 b represents that this is anti-and connects）, wherein, the described 7th
The negative pole of diode and positive pole short circuit, the negative pole of the 8th diode are the input of control signal PWM2, and the 8th diode is just
Pole with the 11st resistance R11 and is connect after being concatenated with the 12nd resistance R12；
First control signal PWM1 is anti-phase with second control signal PWM2；First control signal PWM1,
Second control signal PWM2 is PWM anti-phase mutually；First shaping circuit 202 and the second shaping circuit 302 are respectively used to
Make the rising edge of the first control signal PWM1, the second control signal PWM2 more precipitous, so as to accelerate first switch Q1 and second
The response speed of switch Q2.
Two resistance that first peak absorbing circuit 203 and second peak absorbing circuit 303 include and connect
And the electric capacity concatenated with this and two resistance connecing, i.e. the 7th resistance R7 that the first peak absorbing circuit 203 includes and connects and
8th resistance R8, meanwhile, the 3rd electric capacity C3 for also concatenating with the 7th resistance R7, the 8th resistance R8；Second peak absorbing circuit
303 the 9th resistance R9 for including and connecing and the tenth resistance R10, meanwhile, also concatenate with the 9th resistance R9, the tenth resistance R10
Second electric capacity C2.
First switch Q1, second switch Q2 are field effect transistor；It is former that the drain electrode of first switch Q1 connects described first
The outfan 11 on side, the source ground of first switch Q1；The drain electrode of the second switch Q2 connects the defeated of second former limit
Go out end 1；The source ground of the second switch Q2.
The circuit for power conversion also includes current collection circuit 600；The current collection circuit 600 is arranged on the change
The input of depressor T3 former limits；
The input of the input of first former limit and second former limit is in parallel to access the current collection circuit. and it is excellent
Choosing, the current collection circuit is inductance；
First resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance that the filter circuit 400 includes and connects
R4, and the first electric capacity C1 concatenated with first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4；Institute
State the secondary of filter circuit 400 and the transformator T3 and connect.
In some embodiments, the rectification circuit 500 is bridge rectifier 500.
During work, PWM drive signal PWM1, PWM2 driving FET Q1, Q3 completes copped wave in the primary of transformator T3,
Before T3 level is by 5 feet, the bridge rectifier 500 of 7 feet output to the composition of D7, D8, D9, D10 below, by C1, R1, R2,
R3, R4 are filtered to copped wave pulse, eliminate the spike in copped wave pulse, are conducive to rectifying and wave-filtering below to act on, are reduced defeated
Go out ripple and noise.
The sawtooth waveforms module can include current sampling circuit and/or voltage sample circuit, and, sample rate current process
Circuit and/or voltage sample circuit, auxiliary sawtooth wave generating circuit, main sawtooth wave generating circuit and the second comparison circuit；
As shown in Figures 6 to 9, in the present embodiment, the sawtooth waveforms module includes sample rate current process circuit 1, auxiliary saw
Tooth wave generation circuit 22, main sawtooth wave generating circuit 23 and the second comparison circuit（Feedback circuit 24）；
The sample rate current process circuit 1 includes two inputs, and described two inputs are received from power conversion respectively
The sample rate current gathered at two former limits in parallel of transformator in circuit, and export after being processed into the first signal SIG1；
The auxiliary sawtooth-wave circuit receives the first control wave P_RAMP sent from controller, and is located
Manage to export after secondary signal SIG2；
The main sawtooth-wave circuit receives the second control wave AUX_RAMP sent from controller, and is located
Manage to export after the 3rd signal SIG3
The first signal SIG1, secondary signal SIG2 and the 3rd signal SIG3 are superposed to the 4th signal SIG4, and described
Four signal SIG4 are transmitted to 24 positive terminal of the second comparison circuit；The end of oppisite phase of second comparison circuit 24 receives an error voltage
Signal, and the final sawtooth waveforms PWM_RESET_OUT for producing is fed back to into control module 3.
Sample rate current process circuit 21 includes the full bridge rectifier 211 being sequentially connected, resistance sampling circuit 212, samples
Filter circuit 213 and the first build-out resistor R2；The two ends of the resistance sampling circuit 212 connect the full bridge rectifier respectively
211 two outfans.As shown in fig. 7, in specific embodiment, the resistance sampling circuit 212 is resistance R1.
The wave filtering circuit 213 is LC filter circuits；L1 as shown in Figure 7 and C1 is LC filter circuits.
The auxiliary sawtooth wave generating circuit 22 includes the first negative circuit 221, the first charge-discharge circuit being sequentially connected
222 and second build-out resistor R3.
First charge-discharge circuit 222 includes first resistor R4, second resistance R5 and the first electric capacity C2；Second resistance R5
One end be connected with the outfan of first negative circuit 221, the other end of second resistance R5 and the first resistor
One end connection of R4, the first electric capacity C2；The other end of first resistor R4 is connected with power supply VCC；The first electric capacity C2's
The other end is grounded.
The main sawtooth wave generating circuit 23 includes the second negative circuit 231, the second fully electricity circuit being sequentially connected
232nd, sawtooth comparison circuit 233 and the 3rd build-out resistor R11.
Second fully electricity circuit 232 includes 3rd resistor R6, the 4th resistance R7 and the second electric capacity C6；3rd resistor R6
One end be connected with the outfan of second negative circuit 231, the other end of 3rd resistor R6 and the 4th resistance
One end connection of R7, the second electric capacity C6；The other end of the 4th resistance R7 is connected with power supply VCC；The second electric capacity C6's
The other end is grounded.
The sawtooth comparison circuit 233 includes the 5th resistance R8, the 6th resistance R9, the 7th resistance R10 and comparator U1；Institute
The one end for stating the 5th resistance R8 is connected with the normal phase input end of comparator, and the other end is connected with the outfan of the comparator U1；
The inverting input of the comparator is grounded one end with the second electric capacity C6 by the 6th resistance R9 and is connected；The comparator U1
Inverting input be also connected with the outfan of comparator U1 by the 7th resistance R10；The normal phase input end of the comparator U1
One end connection being also connected with 3rd resistor R6, the 4th resistance R7.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.
Claims (10)
1. a kind of power module, it is characterised in that including control circuit, power conversion module, sawtooth waveforms module；
The sawtooth waveforms module includes current sampling circuit, voltage sample circuit, feedback circuit and saw-tooth wave generating circuit；It is described
Current sampling circuit, voltage sample circuit gather sample rate current, adopt from the outfan and/or load end of the circuit for power conversion
Sample voltage, and the sample rate current, sampled voltage are respectively sent to into the feedback circuit；
The power conversion module includes PWM drive circuit, circuit for power conversion, current rectifying and wave filtering circuit and output filter circuit；
The control circuit sends sawtooth wave control signal to the saw-tooth wave generating circuit to produce benchmark sawtooth waveforms, the benchmark
Sawtooth waveforms combines sample rate current and/or sampled voltage is produced and specifies waveform sawtooth waveforms；The control circuit is also by the specified saw
Tooth ripple is sent to PWM drive circuit as pwm control signal, to drive the circuit for power conversion work.
2. power module according to claim 1, it is characterised in that the circuit for power conversion includes transformator；
The PWM drive circuit includes first control circuit, second control circuit；
The current rectifying and wave filtering circuit includes the filter circuit being sequentially connected in series and rectification circuit；
The transformator includes first former limit and the second former limit of parallel connection；The outfan of the first control circuit and the first former limit
Connection；The second control circuit is connected with the outfan of the second former limit；The secondary of the transformator passes through the filter circuit
It is connected with the rectification circuit.
3. power module according to claim 2, it is characterised in that the first control circuit includes the first shaping electricity
Road, first switch and the first peak absorbing circuit；
The second control circuit includes the second shaping circuit, second switch and the second peak absorbing circuit；
The first switch is connected with the outfan of first former limit；The outfan of the second switch and second former limit
Connection；
The input of first shaping circuit receives the first control signal, and its outfan connects the control of the first switch
End；
The input of second shaping circuit receives the second control signal, and its outfan connects the control of the second switch
End；
First peak absorbing circuit is with the first switch and connects；Second peak absorbing circuit and the second switch
And connect；
First control signal is anti-phase with second control signal.
4. power module according to claim 3, it is characterised in that first peak absorbing circuit and described second sharp
Peak absorbing circuit is included and two resistance connecing and the electric capacity concatenated with this and two resistance connecing.
5. power module according to claim 3, it is characterised in that the first switch, second switch are field effect transistor；
The drain electrode of the first switch connects the outfan of first former limit, the source ground of the first switch；The second switch
Drain electrode connect the outfan of second former limit；The source ground of the second switch.
6. power module according to claim 2, it is characterised in that the current collection circuit is arranged on the transformator
The input of former limit.
7. power module according to claim 6, it is characterised in that the input of first former limit and described second former
The input on side is in parallel to access the current collection circuit.
8. power module according to claim 6, it is characterised in that the current collection circuit is inductance.
9. power module according to claim 2, it is characterised in that first resistor that the filter circuit includes and connects,
Second resistance, 3rd resistor and the 4th resistance, and with the first resistor, second resistance, 3rd resistor and the 4th resistance string
The first electric capacity for connecing；The secondary of the filter circuit and the transformator simultaneously connects.
10. power module according to claim 2, it is characterised in that the rectification circuit is bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621124023.4U CN206060549U (en) | 2016-10-14 | 2016-10-14 | A kind of power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621124023.4U CN206060549U (en) | 2016-10-14 | 2016-10-14 | A kind of power module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206060549U true CN206060549U (en) | 2017-03-29 |
Family
ID=58364013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621124023.4U Withdrawn - After Issue CN206060549U (en) | 2016-10-14 | 2016-10-14 | A kind of power module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206060549U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452082A (en) * | 2016-10-14 | 2017-02-22 | 成都前锋电子仪器有限责任公司 | Power supply module |
-
2016
- 2016-10-14 CN CN201621124023.4U patent/CN206060549U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452082A (en) * | 2016-10-14 | 2017-02-22 | 成都前锋电子仪器有限责任公司 | Power supply module |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170329 Effective date of abandoning: 20181030 |